X-Junk-Score: 0 [] X-Cloudmark-Score: 0 [] X-Cloudmark-Analysis: v=2.3 cv=PbaBeRpd c=1 sm=1 tr=0 a=kjQPJuxXwwprLf2hArMD/g==:117 a=x7bEGLp0ZPQA:10 a=Fee85h93u3AA:10 a=_RQrkK6FrEwA:10 a=qihG7laMpcwA:10 a=Ia-xEzejAAAA:8 a=-OMJOJjeAAAA:8 a=V4B05YJgAAAA:8 a=pGLkceISAAAA:8 a=UKPAHat8AAAA:8 a=7g1VtSJxAAAA:8 a=_6GpL_ENAAAA:8 a=yVl2vSvJpqRFxHOUL7IA:9 a=9Tj5LYBU4ZLzPfuy:21 a=jP9kFSoWOhL6SwA7:21 a=QEXdDO2ut3YA:10 a=Qa1je4BO31QA:10 a=gvSQh4r-fQ0A:10 a=9kDbUwLCZ7h9eSWL:21 a=UupZPT96pn66wnye:21 a=0v5ut_f-rNsVOF0h:21 a=Urk15JJjZg1Xo0ryW_k8:22 a=QnhMYmKtrbbKsxwRCpPK:22 a=o5L99fmz5hJO8Pp-vrK3:22 a=Fc6xXSS-RxGHxrvp76Qp:22 a=grOzbf7U_OpcSX4AJOnl:22 a=pHzHmUro8NiASowvMSCR:22 a=nt3jZW36AmriUCFCBwmW:22 From: "lehanover lehanover@aol.com" Received: from sonic311-14.consmr.mail.bf2.yahoo.com ([74.6.131.124] verified) by logan.com (CommuniGate Pro SMTP 6.2.14) with ESMTPS id 542833 for flyrotary@lancaironline.net; Sat, 18 Jul 2020 13:12:25 -0400 Received-SPF: pass receiver=logan.com; client-ip=74.6.131.124; envelope-from=lehanover@aol.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=aol.com; s=a2048; t=1595092328; bh=g+vu6i/G5m+lMhfSlgHMk5oV2WtDsbhSJO+0AmywTX8=; h=Date:From:To:In-Reply-To:References:Subject:From:Subject; b=qXfYqtEPpX3SXoW25GjZm6hrpZaQobj7gZC8PFFx5Uabfo8bHNuJTYVxS+ZhT0YNTn65DotG9OflwO65CE5Hw5uOsL94k2V0+ggt+VujICKSHlMOlSKle4VD88DB+dh/vp/GgTyeC82fTJh8txQdsuvcmPgYs86atxj1JOsefkIyi9vA4fvp3ZaIHlOVO2kl/ZaHF608D6rQQGAa4ffW+Xz5MWC2brce1QkiXAHkSUgVD7bQqcYOs+kOxzqPVh/Gnd3QM02Q8AhYU5K9r4NvlZR99INLpeNSFRp2MlqgEUwJS5I72EH7wdZ9n5wNRRhtMOqZADzKVnzfeeY7ZKnyug== X-YMail-OSG: 4f7v_30VM1lrqldnntIBV0fN44grZKDt_9JyJZqyh29R.o2aO_P.mlND9T10tXV LAKWlpGfgTgSlyrI4BOOOdtWotMjHcTWwb5Gc9gZNMWMz9VkO5f3xgiZRw8qmm3rSANRMkntqyej vsQzEWKa53UFzqsIokxGjjSylxvbhITxCUICUtGILCdsKsD8wewyLMeS6dVJiSjkQkq9Vru.K64T KUUs6JP_X8Ee4HZmS6ZVu9q7VCwGT.O2HQDYbcRozPuRLeuzU9gMMJwyIsHax2iEMypbgI7iDAfH b0CBMjF0RP2rrd2vak.04qd4N8tM.XnuA8ew8zPZLWfLEUcPzSBHJn7k4WhlXi6s4jVz2YhehVFI IxP5ZH1vjpMnfsgIOTkeSANig8pNA6Slpl_yAwxrwE5ZrVPknnb2UE.EuyCiTCknQhN3y3rspohB JmF9lvC7JXSF46zdr81uvafOoyi5XtqjPG1GsMBblc1qGETE4Gws.n__xErOOcypLTvFXGoJ9WbH Oo3Wxtrfa84M.xJL8XL1e8mz7Nw5FF8YdOsozTXdH002lqf46mEqKKiJdumrI6oQ7WCGE8EMAnRX hGsiQBWhAdYm3DxEVm50AkJILezX3_JahUBpPGD3iNDqFX4YqsbENb1BL5refCvYo0YlPvwUY8DC 0na1.wnLzu3Qv_MFoNmDyEqs8nGLS4uy0T52sQQZ9exXZsKWNlS3DKV539uw4Xmo1slSldSfnRRq nNkvH9kV7xpdl5C94Bz3ySbBs7CpCusEWanSn1yhfKOolTo3zOwTQg00QYRZfzFXktvaLomwdU5d _MEcaiQKuOSaIj9fnp.IeJJZmyB9dkYus7yC7VtQYQ4yY3_7sCmxLBSNnKp2FWAt4jT_93VwxjjI 7G6bwH13oUpNcG6BXCl1Z92x2bSGp6YuAtadsJkqBRx5kntOwy45PxXS9MxgM2mVG5BqXZgI3121 tGfVPG5lMS7N4vKGJKA7eN7OVUH.k2PJj4INpx8ufYGxQCgKZAZBxMx3B99YpbBg.UAsqtD7TCm. vYAJBR4MWHUYa6NtJujJIPTc9O6ir4dec3XoNiE.JGGTnaXwTEX6dwjknyH37t_C9kESNOORDghs PwV44k2oUP8C3Ssj.fGlbg3TrorrSIsFW9641i6YM5vdGCeBjgaRwR2JEaiCb56pDhR4WGXyaKVi EPInCqj2Osx8hU_jGdtKAqrZrOHOzCtWGn6F3ijcBQImvSXwRkxAD9Eb92EWqJG8Rq2OXEiRHMqS Cplxs.n37YZjAg7klDf9uuk9IaMXhu8GX.sX2xT4c.Cf1O9ylMaBmQRx6OfGnWKJyGMRpcAkTsaF qjvpcoQOP5xbTukx3id2u4pKTxsk5x3rs7KX9nF.1oPtW Received: from sonic.gate.mail.ne1.yahoo.com by sonic311.consmr.mail.bf2.yahoo.com with HTTP; Sat, 18 Jul 2020 17:12:08 +0000 Date: Sat, 18 Jul 2020 17:12:06 +0000 (UTC) To: flyrotary@lancaironline.net Message-ID: <928057736.2502729.1595092326735@mail.yahoo.com> In-Reply-To: References: Subject: Re: [FlyRotary] Re: over square and detonation of a rotary for my pilot friend MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_2502728_969882024.1595092326732" X-Mailer: WebService/1.1.16271 aolloki Apache-HttpClient/4.5.7 (Java/1.8.0_252) Content-Length: 16580 ------=_Part_2502728_969882024.1595092326732 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable I used the MAP to see where I was going. Not up on all of this tuning stuff= . My "Over square" is the piston diameter /stroke length.............Sorry.= .....LEH In a message dated 7/18/2020 11:23:11 AM Eastern Standard Time, flyrotary@l= ancaironline.net writes: All, Operating 'oversquare' in the piston a/c world is normally interpreted as M= AP (in inches of water) being larger than engine rpm divided by 100. Ex: 28= " MAP & 2200-2400 rpm during takeoff and climb is oversquare, and would be = a normal occurrence with a fixed pitch Lycoming operating from an airport n= ear sealevel. And virtually all turbocharged a/c engines are *always* opera= ting oversquare to some degree. So the hazard of 'oversquare', in and of itself, is largely an 'old hangar tale'. What Lynn= said is the limiting factor in piston engines, just like the rotary. Not sure how you'd apply the metric to a rotary anyway, since its higher rp= m would mean it is almost never in the 'oversquare' area.Charliehttps://www= .avweb.com/features_old/why-over-square-is-good/ https://www.aopa.org/news-and-media/all-news/2018/october/pilot/savvy-aviat= or-hip-to-be-over-square On 7/18/2020 9:08 AM, Stephen Izett stephen.izett@gmail.com wrote:> Thanks = Bobby.> We are just NA, but the idea of a turbo and 250hp is appealing and = would make the Glasair hum along at altitude!>> Steve I>>> On 18 Jul 2020, = at 9:17 pm, Charlie England ceengland7@gmail.com wrote:>>>> Hi Steve,>> Are you running a turbo? I didn't see it listed = when you asked about oversquare, so I thought you were running NA.>>>> Sent= from BlueMail>> On Jul 18, 2020, at 7:34 AM, "Bobby J. Hughes bhughes@qnsi= .net" wrote:>> Steve,>>>> I used 6800-7000 rp= m, 36-38=E2=80=9D MP with F/A in the 12=E2=80=99s for takeoff.=C2=A0 Around= pattern altitude I would reduce to 6000 rpm and 30-32=E2=80=9D MP with F/A= a little richer than best power in the 13=E2=80=99s. I monitored EGT=E2=80= =99s during all phases of flight and would make mixture changes as needed t= o keep EGT around 1600 or less during high power operations. I used a verni= er cable to control the super charger bypass and could dial in the desired = MP. For the turbo I was planning a 4# waste gate with an air control valve = to apply more pressure to the top of spring at higher altitudes or lower rp= m. Still using the same target numbers as with the super charger. But no tu= rbo for the S21 project. I guess I need to sell it at some point.>>>> So I = only used boost for takeoff and for normalization most of the time. I liked= operating=C2=A0 28- 30=E2=80=9D with the prop between 1700-2000 rpm. Rich = or lean to keep the EGT under 1600F and intake temps under 140F.>>>> Bobby>= >>> Sent from my iPad>>>>> On Jul 17, 2020, at 9:53 PM, Stephen Izett steph= en.izett@gmail.com wrote:>>>>>> Thanks Bobby.= >>> What boost are you running?>>>>>> And I meant to ask, my friend is aski= ng what power setting we consider the engine to be OK with for continual op= eration?>>>>>> Steve Izett>>>>>>> On 18 Jul 2020, at 9:59 am, Bobby J. Hugh= es bhughes@qnsi.net wrote:>>>>>>>> My preferr= ed cruise economy settings 30=E2=80=9D MP, 4800-5200 rpm. F/A 15:8 lean. Or= 30-34=E2=80=9D MP, 5200-5400 rpm F/A 14:0 or whatever was need to keep EGT= below 1600F and intake air temp below 140F.>>>>>>>> Bobby>>>>>>>> From: Ro= tary motors in aircraft [mailto:flyrotary@lancaironline.net]>>>> Sent: Frid= ay, July 17, 2020 7:10 PM>>>> To: Rotary motors in aircraft>>>> Subject: [F= lyRotary] over square and detonation of a rotary for my pilot friend>>>>>>>= > Hi people.>>>>>>>> My test pilot friend and I are continuing our journey = of extending the phase#1 envelope and now experimenting with engine setting= s.>>>> With a flight adjustable prop he is asking questions about 'over squ= are' and detonation.>>>> Can anyone give me an answer for him?>>>>>>>> Than= ks>>>>>>>> Steve Izett>>>> Glasaie Super IIRG Renesis 4 port RD1C variable = pitch prop.>>>>>>>>>>>>>>>>>>>>>>>> -->>>> Homepage: http://www.flyrotary.c= om/>>>> Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary= /List.html>>>>>>>>>>>> Disclaimer>>>>>>>> The information contained in this= communication from the sender is confidential. It is intended solely for u= se by the recipient and others authorized to receive it. If you are not the= recipient, you are hereby notified that any disclosure, copying, distribut= ion or taking action in relation of the contents of this information is str= ictly prohibited and may be unlawful.>>>>>>>> This email has been scanned f= or viruses and malware, and may have been automatically archived by Mimecas= t Ltd, an innovator in Software as a Service (SaaS) for business. Providing= a safer and more useful place for your human generated data. Specializing = in; Security, archiving and compliance. To find out more Click Here.>>>>>>>= >>> -->>> Homepage: http://www.flyrotary.com/>>> Archive and UnSub: http://= mail.lancaironline.net:81/lists/flyrotary/List.html>> --> Homepage:=C2=A0 h= ttp://www.flyrotary.com/> Archive and UnSub:=C2=A0 http://mail.lancaironlin= e.net:81/lists/flyrotary/List.html -- This email has been checked for viruses by Avast antivirus software.http= s://www.avast.com/antivirus --Homepage:=C2=A0 http://www.flyrotary.com/Archive and UnSub:=C2=A0 http://= mail.lancaironline.net:81/lists/flyrotary/List.html ------=_Part_2502728_969882024.1595092326732 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 7bit
I used the MAP to see where I was going. Not up on all of this tuning stuff. My "Over square" is the piston diameter /stroke length.............Sorry......LEH

In a message dated 7/18/2020 11:23:11 AM Eastern Standard Time, flyrotary@lancaironline.net writes:

All,

Operating 'oversquare' in the piston a/c world is normally interpreted
as MAP (in inches of water) being larger than engine rpm divided by 100.
Ex: 28" MAP & 2200-2400 rpm during takeoff and climb is oversquare, and
would be a normal occurrence with a fixed pitch Lycoming operating from
an airport near sealevel. And virtually all turbocharged a/c engines are
*always* operating oversquare to some degree. So the hazard of
'oversquare', in and of itself, is largely an 'old hangar tale'. What
Lynn said is the limiting factor in piston engines, just like the rotary.

Not sure how you'd apply the metric to a rotary anyway, since its higher
rpm would mean it is almost never in the 'oversquare' area.
Charlie


On 7/18/2020 9:08 AM, Stephen Izett stephen.izett@gmail.com wrote:
> Thanks Bobby.
> We are just NA, but the idea of a turbo and 250hp is appealing and would make the Glasair hum along at altitude!
>
> Steve I
>
>> On 18 Jul 2020, at 9:17 pm, Charlie England ceengland7@gmail.com <flyrotary@lancaironline.net> wrote:
>>
>> Hi Steve,
>> Are you running a turbo? I didn't see it listed when you asked about oversquare, so I thought you were running NA.
>>
>> Sent from BlueMail
>> On Jul 18, 2020, at 7:34 AM, "Bobby J. Hughes bhughes@qnsi.net" <flyrotary@lancaironline.net> wrote:
>> Steve,
>>
>> I used 6800-7000 rpm, 36-38” MP with F/A in the 12’s for takeoff.  Around pattern altitude I would reduce to 6000 rpm and 30-32” MP with F/A a little richer than best power in the 13’s. I monitored EGT’s during all phases of flight and would make mixture changes as needed to keep EGT around 1600 or less during high power operations. I used a vernier cable to control the super charger bypass and could dial in the desired MP. For the turbo I was planning a 4# waste gate with an air control valve to apply more pressure to the top of spring at higher altitudes or lower rpm. Still using the same target numbers as with the super charger. But no turbo for the S21 project. I guess I need to sell it at some point.
>>
>> So I only used boost for takeoff and for normalization most of the time. I liked operating  28- 30” with the prop between 1700-2000 rpm. Rich or lean to keep the EGT under 1600F and intake temps under 140F.
>>
>> Bobby
>>
>> Sent from my iPad
>>
>>> On Jul 17, 2020, at 9:53 PM, Stephen Izett stephen.izett@gmail.com <flyrotary@lancaironline.net> wrote:
>>>
>>> Thanks Bobby.
>>> What boost are you running?
>>>
>>> And I meant to ask, my friend is asking what power setting we consider the engine to be OK with for continual operation?
>>>
>>> Steve Izett
>>>
>>>> On 18 Jul 2020, at 9:59 am, Bobby J. Hughes bhughes@qnsi.net <flyrotary@lancaironline.net> wrote:
>>>>
>>>> My preferred cruise economy settings 30” MP, 4800-5200 rpm. F/A 15:8 lean. Or 30-34” MP, 5200-5400 rpm F/A 14:0 or whatever was need to keep EGT below 1600F and intake air temp below 140F.
>>>>
>>>> Bobby
>>>>
>>>> From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]
>>>> Sent: Friday, July 17, 2020 7:10 PM
>>>> To: Rotary motors in aircraft
>>>> Subject: [FlyRotary] over square and detonation of a rotary for my pilot friend
>>>>
>>>> Hi people.
>>>>
>>>> My test pilot friend and I are continuing our journey of extending the phase#1 envelope and now experimenting with engine settings.
>>>> With a flight adjustable prop he is asking questions about 'over square' and detonation.
>>>> Can anyone give me an answer for him?
>>>>
>>>> Thanks
>>>>
>>>> Steve Izett
>>>> Glasaie Super IIRG Renesis 4 port RD1C variable pitch prop.
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> --
>>>>
>>>>
>>>> Disclaimer
>>>>
>>>> The information contained in this communication from the sender is confidential. It is intended solely for use by the recipient and others authorized to receive it. If you are not the recipient, you are hereby notified that any disclosure, copying, distribution or taking action in relation of the contents of this information is strictly prohibited and may be unlawful.
>>>>
>>>> This email has been scanned for viruses and malware, and may have been automatically archived by Mimecast Ltd, an innovator in Software as a Service (SaaS) for business. Providing a safer and more useful place for your human generated data. Specializing in; Security, archiving and compliance. To find out more Click Here.
>>>>
>>>
>>> --
>
> --


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